37 results about "N-Propanol" patented technology

The utility model provides an adsorption and desorption tank which comprises a tank body, the tank body is vertically arranged, the upper end and the lower end of the tank body are respectively connected with an upper sealing head and a lower sealing head, the lower sealing head is connected with a three-way pipe, the upper sealing head is connected with a discharging pipe and an air inlet pipe, a supporting plate with holes is arranged at the lower end in the tank body, and a pressing plate with holes is arranged at the upper end in the tank body. A molecular sieve adsorption and desorption agent is filled between the porous supporting plate and the porous pressing plate; a bracket is further fixedly connected into the lower end socket, and the supporting plate with the holes abuts against the bracket. According to the utility model, the problem that the production cost is increased due to reduction of the normal propyl alcohol recycling amount caused by excessive water content in the prior art is solved. The utility model also provides a device for removing water in n-propyl alcohol, which comprises a pair of the adsorption and desorption tanks, and the two adsorption and desorption tanks are combined to alternately perform adsorption and desorption processes, so that the continuity of dehydration operation is ensured, and the overall production efficiency can be further improved.

The disclosure relates to a catalyst suitable for electrochemical reduction reactions of one or more carbon oxides, comprising a nitride-doped multi-metallic material comprising a primary metal being copper and one or more secondary metals selected from silver, gold, platinum, palladium, ruthenium, iridium, osmium, and any mixture thereof, wherein the nitride-doped multi-metallic material comprises, as determined by XRD, copper, copper nitride and copper-Me alloy wherein Me is one of the secondary metals and to a gas diffusion electrode suitable for electrolysis of one or more carbon oxides comprising such a catalyst.

The invention discloses a rectification device and method for separating and purifying normal propyl alcohol-isopropyl alcohol-tetrahydrofuran-water azeotrope, relates to the field of separation and purification, and provides a novel rectification tower which is internally provided with two vertical partition plates, ethylene oxide is used as a reaction solvent, ethylene glycol is used as an extraction agent, and the normal propyl alcohol-isopropyl alcohol-tetrahydrofuran-water azeotrope is separated and purified. The separation and purification of the n-propanol-isopropanol-tetrahydrofuran-water azeotrope are realized in the rectifying tower, the process flow is short, the separation effect is good, the thermal efficiency is high, the energy consumption is low, the emission of carbon dioxide is less, the equipment investment is less, the occupied area is small, the obtained n-propanol, isopropanol and tetrahydrofuran are high in purity, the practicability is strong, and the sustainable development is favorably realized. Compared with the traditional multi-stage extractive distillation, the rectifying tower disclosed by the invention has the advantages that the heat utilization efficiency is improved, the equipment investment is reduced by about 40-50%, the occupied area is reduced by about 50-60%, and the construction cost is effectively saved.

A process for co-feeding gaseous ethylene and liquid allyl alcohol in the presence of a catalyst to produce 1,4-butanediol and n-propanol may comprise: introducing a gaseous mixture of ethylene, carbon monoxide, and hydrogen in a solvent into a reactor in the presence of a hydroformylation catalyst; introducing liquid allyl alcohol (AA) into the reactor; and conducting a hydroformylation reaction at a temperature between 50° C. and 100° C. to obtain a hydroformylation product.

The invention discloses a catalyst for acetylene method synthesis of vinyl acetate, a preparation method and application thereof, and relates to the technical field of acetylene gas phase method synthesis of vinyl acetate, in the preparation process of the catalyst, a mixed solvent is used for dissolving an active component, then a carrier is impregnated, the volume of water in the mixed solvent is 20-95%, and the volume of water in the carrier is 20-95%; the residual volume is one or a mixture of two of methanol, ethanol, n-propanol, isopropanol, n-butanol and isobutanol, or a mixture of three or more than three solvents. The solvent can significantly reduce the polarity of the solution, and experiments and characterization show that the agglomeration of the active components is significantly reduced, the dispersion of the active components is enhanced, and the performance of the catalyst is improved.

The invention relates to the technical field of biomedicine, and discloses an application of a light-driven organic semiconductor nano motor in preparation of a product for promoting differentiation of neural stem cells, and the organic semiconductor nano motor is obtained by carrying out surface treatment on poly (3-hexylthiophene) through lauryl sodium sulfate and normal propyl alcohol. In-vivo experiments find that in-situ injection of the P3HT nanomotor in a subventricular region (V-SVZ) of a mouse can maintain stable photoresponse performance under visible light irradiation, and can promote directional differentiation of neural stem cells to a neural pedigree (rather than glial cells). In addition, the organic semiconductor nano motor has good cytocompatibility and systemic biological safety, and has a good application prospect in the field of nerve regeneration medicine.

The invention belongs to the technical field of wine making, and discloses a method for reducing acetic acid and n-propyl alcohol in fermented grains of Maotai-flavor liquor in a sand making round and application of the method. The method comprises the following steps: performing high performance liquid chromatography to obtain phenylalanine content information of yeast for making hard liquor; adding food-grade phenylalanine into the yeast for making hard liquor, and uniformly mixing; the yeast added with phenylalanine is applied to the brewing process of Maotai-flavor liquor, the content of acetic acid and n-propyl alcohol in fermented grains is reduced, the problem that the content of acetic acid and n-propyl alcohol is high in the brewing process is solved, and the flavor of the fermented grains is improved. The invention finds that phenylalanine has obvious effects of reducing acetic acid and normal propyl alcohol, and verification is carried out in a pit fermentation system. According to the method, phenylalanine is applied to Maotai-flavor liquor brewing for the first time, the problem that the content of acetic acid and n-propyl alcohol in fermented grains is too high can be solved, and the method is convenient to operate, high in applicability and suitable for large-scale liquor production. Meanwhile, the method also provides theoretical support for scientific evaluation of the quality of the yeast for making hard liquor.

This invention discloses an azeotropic extraction apparatus and method for enhanced separation of a mixture of n-propanol, isopropanol, and acetonitrile using ionic liquids. The apparatus includes an azeotropic distillation column, a product separation column, an extractive distillation column, and two-stage adiabatic flash tanks. Part of the isopropanol from the top of the product separation column is refluxed to the azeotropic distillation column as an azeotropic agent. The ionic liquid from the bottom of the extractive distillation column is recovered via a first-stage flash tank and a second-stage flash tank. The vapor from the top of the second-stage flash tank is compressed by a compressor and then recycled back to the first-stage flash tank, forming a heat self-coupling. The control scheme includes temperature control via sensitive plates at both ends of the product separation column and cascade control of the extractant / azeotropic agent ratio. This invention operates at atmospheric pressure, avoiding investment in high-pressure equipment; the recovered ionic liquid purity reaches 99.9% and can be recycled long-term; and it can stably produce a product with a purity ≥99.9% even within a feed composition fluctuation range of ±30%.

The invention discloses a thin-layer identification method for a cornu gorais medicinal material in a phlegm-heat-clearing injection, which comprises the following steps: (1) pre-treating the phlegm-heat-clearing injection to obtain a test solution, and pre-treating a reference medicinal material or a reference substance to obtain a reference medicinal material solution or a reference substance solution; and (2) carrying out thin-layer chromatography identification analysis on the pair of test sample solutions, the negative blank sample solution of the phlegm-heat clearing injection without cornu gorais, the reference medicinal material solution and / or the reference substance solution, wherein in the step of thin-layer chromatography identification analysis, n-propyl alcohol, glacial acetic acid, ethanol and water are used as a developing solvent, and the volume ratio of n-propyl alcohol to glacial acetic acid to ethanol to water is (0.5-5): (0.5-5): (0.5-5): (0.5-5). According to the thin-layer identification method disclosed by the invention, a theoretical basis is provided for the quality control of the phlegm-heat-clearing injection and the deep research of a pharmacodynamic material basis by detecting the cornu gorais medicinal material in the phlegm-heat-clearing injection.

The application discloses a production process of trans-zeatin, which comprises the following steps: refluxing E-2-(4-hydroxy-3-methyl-2-butene)-phthalimide with sodium hydroxide in methanol to obtain (E)-4-amino-1-hydroxy-2-methyl-2-butene; filtering and collecting the filtrate and concentrating the filtrate; and reacting the concentrated filtrate with 6-chloropurine in n-propanol and triethylamine as an acid-binding agent to finally obtain trans-zeatin. The application uses E-2-(4-hydroxy-3-methyl-2-butene)-phthalimide as a raw material, and high-purity trans-zeatin is obtained through two steps. The preparation method can effectively improve the yield of trans-zeatin, is simple and convenient to operate, is convenient for industrial popularization, and has good economic and social benefits.

The invention relates to a preparation method of a hydrogenation catalyst suitable for preparing n-propyl alcohol through liquid-phase hydrogenation of propionaldehyde, which comprises the following steps: S1, preparing a precursor solution: dissolving sodium carbonate in deionized water to prepare a mixed nitrate solution with the total metal ion concentration of 0.8-1.2 mol / L, and dissolving sodium carbonate in desalted water to prepare a sodium carbonate solution as a precipitator; s2, co-precipitation reaction: under a stirring condition, adding the mixed nitrate solution and a precipitant into a reaction kettle at the same time to obtain a precipitate, and after the precipitate is fully aged, removing foreign ions in the precipitate; s3, drying and roasting: drying the precipitate, and roasting in an air atmosphere to obtain composite oxide powder; s4, molding: preparing the composite oxide powder into cylindrical catalyst particles; and S5, secondary drying and roasting: carrying out drying treatment and roasting treatment on the cylindrical catalyst particles to obtain a final catalyst product.

The application discloses a kind of low-temperature heat conversion green working medium and its preparation method and application, and green working medium includes the following mass percentage components: 25%~90% alcohol, 1%~5% alcohol amine, 1%~5% aromatic compound, the rest is water;Alcohol includes at least three kinds of methanol, ethanol, isopropanol, ethylene glycol, n-propanol and n-butanol.The working medium of the application is coupled with physical phase change, endothermic chemical reaction, and the heat sink can reach more than 6MJ / kg, which can be used for the absorption of aerodynamic heat of high-speed aircraft with a speed higher than 5 Mach, has the advantages of low cost and strong cooling capacity, and is suitable for the thermal protection system of high heat flux density and long-time aerodynamic heating components.In addition, high-temperature and high-pressure small molecule gas is generated for work, effectively enhancing the maneuverability of high-speed aircraft.

The application provides a squalene fermentation liquor and a method for determining the content of extracted process sample acetone, n-heptane, ethanol and squalene, relates to the field of chemical industry, and specifically comprises the following steps: S1, preparing a test solution: determination of acetone, n-heptane and ethanol: accurately weighing n-propanol and a sample, and shaking to obtain; determination of squalene: accurately weighing squalene and n-propanol in a volumetric flask, adding ethyl acetate to the scale, and shaking to obtain; the test solution is detected by using a gas chromatography method, and the content of acetone, n-heptane, ethanol and squalene is calculated by using an internal standard method; the linear relationship between the theoretical concentration and the detected concentration in the concentration range is investigated, ethanol r=0.999, the average recovery rate is 101%; acetone r=1.000, the average recovery rate is 99%; n-heptane r=1.000, the average recovery rate is 100%; and squalene r=1.000, the average recovery rate is 100%.

This invention relates to a homogeneous extractive distillation method for separating the formate-n-propanol azeotrope using [EMIM][AC], belonging to the field of special distillation technology containing ionic liquids. The method includes the following steps: a mixture of formate and n-propanol is fed into an extractive distillation column; the ionic liquid 1-ethyl-3-methylimidazolium acetate ([EMIM][AC]) is added from the top of the column, and extractive distillation is performed inside the column. Formate is obtained at the top of the column, and a mixture of n-propanol and the ionic liquid is obtained at the bottom. The bottom stream is sequentially fed into a primary flash tank and a secondary flash tank for fractional flash evaporation recovery. The n-propanol-rich vapor phases obtained from the tops of the primary and secondary flash tanks are condensed and then combined to obtain the n-propanol product. The regenerated ionic liquid obtained from the bottom of the secondary flash tank is recycled back to the extractive distillation column for reuse. This method has the advantages of simple process, high separation efficiency, and recyclability of the ionic liquid.

The utility model belongs to the technical field of chemical equipment, and particularly relates to an n-propyl alcohol purification and recovery device which is characterized in that a liquid inlet pipe is arranged at one end of a distillation retort, a plurality of zeolite molecular sieves are fixedly arranged on the inner wall of the distillation retort, a condensing box is arranged above the distillation retort, a condensing component is arranged in the condensing box, and a stirring component is arranged in the distillation retort; when the normal propyl alcohol is dehydrated and purified, the normal propyl alcohol introduced into the distillation tank is heated and distilled through the heating wire on the stirring assembly, so that the normal propyl alcohol is boiled, the normal propyl alcohol can be heated more uniformly through the stirring assembly, normal propyl alcohol steam rises to the zeolite molecular sieve, and the normal propyl alcohol can be dehydrated and purified through the characteristics of high adsorption capacity, strong selectivity and high temperature resistance of the zeolite molecular sieve. According to the normal propyl alcohol vapor adsorption device, water vapor in normal propyl alcohol vapor can be adsorbed, then the normal propyl alcohol vapor is dehydrated through the zeolite molecular sieve and then passes through the condensation assembly in the condensation box, the hot normal propyl alcohol vapor is condensed into a liquid state, collection is convenient, the normal propyl alcohol vapor cannot cause thermal pollution to the environment, and a certain protection effect on the environment is achieved.

The application belongs to the field of non-metallic compounds, and particularly relates to a preparation method and a preparation device of mercaptan. The preparation method is prepared by reacting a sulfuric acid monoester salt RO SO2OM1 with a sulfhydryl M2SH in a solvent, wherein the sulfuric acid monoester salt is a monomethyl sulfate CH3OSO2OM1 or a monoethyl sulfate C2H5OSO2OM1, M1 and M2 are independently Na or K, and the solvent is one or a mixture of multiple of methanol, ethanol, n-propanol, isopropanol, hexafluoroisopropanol, N, N-dimethylformamide, N, N-dimethylacetamide, N-methylpyrrolidone and dimethyl sulfoxide. The application has the technical features of (1) high economic benefit, (2) high conversion rate and good selectivity, (3) simple process and mild conditions, (4) environmental friendliness and resource recycling, and (5) safety improvement.

The present invention relates to a process for the reduction of reactor fouling in a high pressure polymerization reactor comprising a siloxane-bonded polymer layer adhered to at least one reactor wall, wherein the process comprises contacting the siloxane-bonded polymer layer with an alcohol in an amount of not more than 2 wt.-%, based on the total amount of the reactor feed, wherein the alcohol is in supercritical state. The alcohol may be selected from the group consisting of methanol, ethanol, n-propanol, iso-propanol, n-butanol, and iso-butanol, or a combination thereof. The siloxane-bonded polymer layer may comprise an ethylene copolymer. The above process improves heat transfer at the reactor walls by reducing or removing said siloxane-bonded polymer layer and reducing fouling phenomena. This in turn improves product output, process control, product quality and reproducibility of the obtained polymers, and decreases down-time of the reactor.

The invention relates to a sodium polystyrenesulfonate resin purification method, which comprises: washing sodium polystyrenesulfonate resin by sequentially using a first solvent, a second solvent, a salt solution, an acid solution and a sodium-based alkali solution to obtain purified sodium polystyrenesulfonate resin, the first solvent comprises any one or a combination of at least two of dichloromethane, trichloromethane, 1, 2-dichloroethane or diethyl ether; the second solvent comprises any one or a combination of at least two of methanol, ethanol, normal propyl alcohol or acetone. According to the method, through multi-step dynamic swelling washing, organic residues, metal ions and process impurities in resin pores are effectively removed, the purity is remarkably improved, and a final product is basically consistent with American Romen and Haas IRP-69 resin in the aspects of color, physical and chemical properties and the like, meets the requirements of the standard number JF20100005 of the Registration Standard of Inlet Medicine and can meet the high-standard requirements of pharmaceutical excipients.

The present disclosure is directed to methods of purifying a solvent, such as an alcohol including n-propanol. The purified solvent can be used, e.g., as a pre-wet liquid, solution developer, and cleaner in a multistep semiconductor manufacturing process.

The application provides a hole transport layer precursor solution, a hole transport layer and a preparation method and application thereof, and a perovskite battery, and belongs to the technical field of hole transport layers.The hole transport layer precursor solution comprises self-assembled monomers and an organic solvent;the organic solvent comprises solvent A, solvent B and solvent C;the solvent A comprises one or more of phosphoric acid ester solvents and alcohol ether solvents;the solvent A contains four hydrogen bond acceptors;the boiling point of the solvent A is 215 DEG C-290 DEG C;the solvent B comprises one or more of ethanol, isopropanol, n-propanol, butanol, ethylene glycol and N, N-dimethylformamide; and the solvent C comprises one or more of ethyl acetate and n-hexane.Through the ternary hydrogen bond network formed by the solvent A, the solvent B and the solvent C, the agglomeration degree of the SAM molecules is significantly reduced, and the device performance is improved.

The invention belongs to the field of coal chemical industry, and particularly relates to a method for preparing 1, 3-propylene glycol from an intermediate product methyl glycolate of a coal-to-ethylene glycol process. According to the method, an intermediate product methyl glycolate of a coal-to-ethylene glycol process is used as a raw material, and 1, 3-propylene glycol is synthesized through three steps of synthesis of monomethyl malonate through carbonyl synthesis of methyl glycolate, synthesis of dialkyl malonate through esterification of monomethyl malonate and hydrogenation of dialkyl malonate. The method specifically comprises the following steps: (1) synthesizing monomethyl malonate from methyl glycolate in a high-pressure reaction kettle through a catalytic carbonylation method; (2) carrying out catalytic esterification on the monomethyl malonate and lower alkyl alcohol (methanol, ethanol, n-propanol and the like) under a normal pressure condition to prepare diester malonate; and (3) carrying out catalytic hydrogenation on the malonic acid diester in a fixed reaction bed to prepare 1, 3-propylene glycol.

The invention belongs to the technical field of microorganisms, and particularly relates to gluconobacter oxydans and application thereof. The strain ZLV2-2 is classified and named as Gluconobacter oxydans, the Gluconobacter oxydans is preserved in China General Microbiological Culture Collection Center (CGMCC) on October 29, 2025, and the preservation number is CGMCC NO.36411. The strain ZLV2-2 is named as Gluconobacter oxydans. The Gluconobacter oxydans ZLV2-2 provided by the invention has strong genetic stability, can efficiently ferment and convert isopentenol to synthesize isopentenoic acid, has a wide action substrate spectrum, also has a good conversion effect on primary alcohols such as n-propanol and n-butanol, and has industrial application potential; the method is simple in production process, mild in condition, green and safe, avoids the problems of high energy consumption and environmental pollution of a traditional chemical method, has few by-products, and is beneficial to extraction and separation operation.

The present disclosure is directed to methods of purifying a solvent, such as an alcohol including n-propanol. Such methods can be performed, for example, by: distilling feed grade n-propanol in a first distillation column to obtain an intermediate grade n-propanol, wherein the first distillation column is operated at a pressure of less than about 200 Torr; transferring the intermediate grade n-propanol to a second distillation column, wherein the second distillation column is operated at between about 730 and about 760 Torr; and distilling the intermediate grade n-propanol in the second distillation column to provide finished goods grade n-propanol. The purified solvent can be used, e.g., as a pre-wet liquid, solution developer, and cleaner in a multistep semiconductor manufacturing process.

The invention discloses a method for preparing crystalline L-carnitine, which comprises the step of crystallizing L-carnitine in a mixed solvent consisting of cyclohexane and alcohol, and the alcohol is selected from one or more of n-propanol, isobutanol and n-butanol.

An aerosolized HVAC / R system solvent for decontaminating HVAC / R components and line sets. The solvent contains 25-90 wt % propellant, and 10-75 wt % solvent mixture which is about 60-95 wt % trans-1,2, dichloroethylene, about 5-20 wt % n-propanol, and an inerting constituent providing a weight percent ratio of the inerting constituent to n-propanol of less than 1.5. The solvent is packaged in a container that is connected to the HVAC / R components or line sets to be decontaminated for supplying the solvent mixture under pressure to the HVAC / R components or line sets.

The invention belongs to the field of nonmetal compounds, and particularly relates to a preparation method and a preparation device of mercaptan. According to the preparation method, sulfuric acid monoester salt ROSO2OM1 and hydrosulfide M2SH are subjected to a reaction in a solvent, the sulfuric acid monoester salt is sulfuric acid monomethyl salt CH3OSO2OM1 or sulfuric acid monoethyl salt C2H5OSO2OM1, and M1 and M2 are independently Na or K; the solvent is one or a mixture of more of methanol, ethanol, n-propanol, isopropanol, hexafluoroisopropanol, N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl pyrrolidone and dimethyl sulfoxide, and the solvent is one or a mixture of more of methanol, ethanol, n-propanol, isopropanol, hexafluoroisopropanol, N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl pyrrolidone and dimethyl sulfoxide. The method has the advantages that (1) the economic benefit is high; (2) the conversion rate is high, and the selectivity is good; (3) the process is simple, and conditions are mild; (4) the method is environment-friendly, and resources are recycled; and (5) the safety is improved.

The invention belongs to the technical field of microbial fermentation, and discloses a method for regulating and controlling the production of n-propanol by Lactobacillus breadmucus and application of the method. The content of the n-propanol produced by Lactobacillus breadmucus is controlled by regulating and controlling the content of organic acid in Baijiu brewing; comprising the following steps: regulating and controlling the production of n-propyl alcohol by lactobacillus breadmucus through exogenously adding organic acid; the content of n-propanol in the base liquor is regulated and controlled by controlling the acidity of after-run in the liquor brewing process. Lactobacillus breadmucus is a predominant functional microorganism for producing n-propanol in the sand making turn of Maotai-flavor liquor, it is found for the first time that organic acid can significantly affect n-propanol accumulation of lactobacillus breadmucus, and based on this, the effect of regulating and controlling the n-propanol content of base liquor by controlling the acidity of after-run is verified in a pit fermentation system. The invention provides an effective strategy for regulating and controlling the content of n-propanol in white spirit production based on the interaction of microorganisms and metabolites (organic acids). The method is good in application effect, easy and convenient to operate, high in practicability and high in universality.

The application relates to an environment-friendly desorption material for efficiently repairing chlorinated hydrocarbon contaminated aquifers. The total mass of the desorption material is used as a basis, and the desorption material comprises the following components: 1.0 wt.% alkyl polyglycoside (APG) 1214, 5.6 wt.% co-surfactant, and 0.8 wt.% sodium chloride, wherein the co-surfactant is composed of n-propanol and isobutyl alcohol at a mass ratio of 1:1. The prepared desorption material has a wide environmental application range, a low surfactant dosage, and high desorption performance. The alcohol of the composite alcohol desorption material is wide, the particle size is small, and the interfacial tension is small; the desorption rate of in-situ leaching PCE reaches 99.4%, which is 68% higher than that of single surfactant (1.0 wt.% APG1214) at the same temperature; the primary biodegradation degree of the surfactant APG1214 reaches 90.27% at 163 h, and the secondary pollution generated in the repair process is small.

The invention discloses a purification method for separating ultra-pure isopropanol from a mixture of water, normal propyl alcohol and isopropanol, and relates to the technical field of ultra-pure electronic chemicals, the method comprises the following steps: 1, adding isopropanol, water and a product containing normal propyl alcohol into an azeotropic distillation tower; 2, separating and discharging an azeotrope containing isopropanol, n-propanol and water from the top of the azeotropic distillation tower, and feeding the azeotrope into a dehydrating tower; 3, separating and discharging isopropanol and n-propanol as a first underflow from the bottom of the dehydrating tower, and feeding the first underflow into a distillation and purification tower; and 4, separating and discharging isopropanol as a first top flow at the top of the distillation purification tower. According to the method, isopropanol can be produced by removing water and then removing n-propyl alcohol, so that the ultra-pure isopropanol is produced.

The present application provides a method for synthesizing n-butyric acid from n-propanol carbonyl, which comprises the following steps: taking n-propanol as raw material, and performing carbonylation reaction in the presence of a catalytic system composed of a rhodium main catalyst, lithium iodide, hydroiodic acid and a nickel salt auxiliary, and introducing carbon monoxide. The present application overcomes the huge steric hindrance and thermodynamic instability brought by carbon chain growth (from C1 methanol to C3 n-propanol), breaks the extremely low reaction rate of n-propanol carbonylation (kinetic bottleneck), effectively inhibits the isomerization side reaction specific to long carbon chain, and thus provides a n-butyric acid synthesis method with high space-time yield and high product selectivity.